﻿/*
* Copyright (c) 2006-2007 Erin Catto http://www.gphysics.com
*
* This software is provided 'as-is', without any express or implied
* warranty.  In no event will the authors be held liable for any damages
* arising from the use of this software.
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/

// The pair manager is used by the broad-phase to quickly add/remove/find pairs
// of overlapping proxies. It is based closely on code provided by Pierre Terdiman.
// http://www.codercorner.com/IncrementalSAP.txt

package Box2D.Collision{


import Box2D.Common.*;


public class b2Pair
{
   

   public function SetBuffered() : void   { status |= e_pairBuffered; }
   public function ClearBuffered() : void   { status &= ~e_pairBuffered; }
   public function IsBuffered():Boolean   { return (status & e_pairBuffered) == e_pairBuffered; }

   public function SetRemoved() : void      { status |= e_pairRemoved; }
   public function ClearRemoved() : void   { status &= ~e_pairRemoved; }
   public function IsRemoved():Boolean      { return (status & e_pairRemoved) == e_pairRemoved; }
   
   public function SetFinal() : void      { status |= e_pairFinal; }
   public function IsFinal():Boolean      { return (status & e_pairFinal) == e_pairFinal; }

   public var userData:* = null;
   public var proxyId1:uint;
   public var proxyId2:uint;
   public var next:uint;
   public var status:uint;
   
   // STATIC
   static public var b2_nullPair:uint = b2Settings.USHRT_MAX;
   static public var b2_nullProxy:uint = b2Settings.USHRT_MAX;
   static public var b2_tableCapacity:int = b2Settings.b2_maxPairs;   // must be a power of two
   static public var b2_tableMask:int = b2_tableCapacity - 1;
   
   // enum
   static public var e_pairBuffered:uint = 0x0001;
   static public var e_pairRemoved:uint = 0x0002;
   static public var e_pairFinal:uint = 0x0004;

};


}